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NTE1805
Integrated Circuit
Recording Video Signal Processing Circuit
Description:
The NTE1805 i s a n i ntegrated c ircuit i n a 2 8–Lead D IP t ype p ackage d esigned f or u se i n V CR r ecording
video signal processing.
Features:
D Dynamic Emphasis Characteristics: 5.5dB (at f = 1MHz, input level = –20dB)
D Built–In Carrier Interleaving Circuit
D Built–In Low Pass Filter (Sync–Separation Circuit)
D Supply Voltage: V
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Supply Voltage, V
CC
Power Dissiption (T
Operating Ambient Temperature Range, T
Storage Temperature Range, T
= 5V
CC
= +70°C), P
A
stg
6V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D
–20° to +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
opr
250mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–55° to ∼+150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (VCC = 5V, TA = +25°C unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Circuit Current I
AGC Output Amplification u
AGC Control Sensitivity Du
Playback Amp Gain G
12dB Amp Gain G
FM Oscillation Frequency f
FM Output 2nd High Frequency 2f
FM Oscillation Output Amplification u
Frequency Control Sensitivity
FM Oscillation
15–16
b
20
6–8
Pin12 High (Record) 14.5 – 35.5 mA
Pin12 Open (Playback) 14.5 – 35.5 mA
Pin12 High, Video Input 1V
8
Pin12 High, Video Input 0.5 to 2V
8
Pin12 Open 6.8 – 9.9 dB
Pin12 High, CO = 39pF, RO = 12kΩ 2.9 – 3.9 MHz
o
o
28
Pin12 High, CO = 39pF, RO = 8.2 to 15kΩ 11.4 – 14.5 kHz/µA
28
P–P
P–P
0.4 – 0.8 V
– – 1.5 dB
10.4 – 13.4 dB
– – –33 dB
0.65 – 1.35 V
Note 1. Operating Supply Voltage Range: VCC = 4.5V to 5.5V.
P–P
P–P
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Electrical Characteristics (Cont’d): (VCC = 5V, TA = +25°C unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Sync Separator Input Sensitivity S
Sync Separator Output Amplification u
NL Limiter Gain u
NL Limiter Output Amplification u
NC Limiter Gain u
NC Limiter Output Amplification u
EE Amp Gain G
VV Amp Gain u
Chroma Amp Gain G
EE/VV Crosstalk CT
Mute Crosstalk CT’
EE/VV Changeover Sensitivity S
FM Oscillation Carrier Interleave Df
V Offset Du
17–21
14–10
19–10
12–10
8–10
19–10
19–10
19−10
Video Input V/S = 5/2 0.45 – – V
19
Video Input V/S = 5/2 4.3 – – V
2
Pin12 High 20 – 40 mV
Pin12 High 26 – 64 mV
21
Pin12 High, Pin18 Low 6.0 – 2.6 mV
Pin12 Open 30 – 70 mV
Pin12 Open 65 – 125 mV
10
Pin12 High 9.7 – 11.6 dB
Pin12 Open 1.65 – 2.15 V
E y 4V
Pin12 Low, Pin11 High – – –40 dB
12
Pin12 High 5.9 – 9.9 kHz
o
Pin12 Low 30 – 110 mV
Note 1. Operating Supply Voltage Range: VCC = 4.5V to 5.5V.
P–P
P–P
P–P
P–P
P–P
P–P
P–P
P–P
5.3 – 8.8 dB
– – –40 dB
4 – – V
Pin Connection Diagram
Sync Tip Level Detect
Sync Output
EE Level Adjust
Video Signal Input During Recording
AGC Detector
Video Signal Input During Playback
Sub Clamp Output
GND
EE/VV Output
Dummy Sync Pulse Input
PB Chroma Input
Noise Canceller L.P.F.
Noise Canceller H.P.F. Side Input
1
2
3
4
5
6
7Sub Clamp Detector
8
9
10
11
28
27
26
25
24
23
22
21
20
19
18
12 17
13
14
16
15
FM Output
White Clip Level Adjustment
Mod
Mod
Dark Clip Level Adjustment
Mod Input
FB Amp Input
Main Emphasis Output
V
CC
Main Clamp Input
PG Input & 2/4/6 Hour Select
Non–Linear Emphasis Sub–Side Input
12dB Amp Output
12dB Amp Input
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28 15
114
1.120 (28.4) .338
(8.6)
.200
(5.08)
.070 (1.78)
.130 (3.3)
.400
(10.16)
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